# Dapper vs Diesel

**Leader by vioscaleAI score:** Diesel

| Attribute | Dapper | Diesel |
|---|---|---|
| **vioscaleAI score** | 49.8 (33% (low)) | 62.1 (50% (medium)) |
| activity.commits_last_30d | 3 | 100 |
| adoption.dependent_repos | 477 | 3,691 |
| adoption.github_stars | 18,402 | 14,201 |
| content.faq | - | `[{"answer":"An open-source object-relational mapping and query builder library for Rust that enables compile-time verification of database interactions and supports multiple database backends through composable query abstractions. It is indexed under ORM & Database Tools.","source":"https://diesel.rs","question":"What is Diesel?","confidence":0.6},{"answer":"Diesel is open source, so it can be self-hosted and used at no licence cost. It is released under the Apache-2.0 licence. Pricing changes often, so verify at source before relying on it.","source":"https://diesel.rs","question":"Is Diesel free to use?","confidence":0.6},{"answer":"Yes. Diesel is published under the Apache-2.0 licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/diesel-rs/diesel","question":"Is Diesel open source?","confidence":0.95}]` |
| deployment.options | - | `{"self_hosted":true}` |
| description.long | A micro-ORM for .NET that extends ADO.NET connections to execute SQL queries and stored procedures, supporting both synchronous and asynchronous operations with features for object mapping, dynamic SQL building, and multi-result set processing. | A Rust library that provides type-safe database access with compile-time verification, featuring both a query builder API and raw SQL support across multiple database systems including PostgreSQL, MySQL, and SQLite. |
| features.capabilities | `{"raw_sql":true,"multi_db":true,"languages":"C# / .NET (all TFMs)","relations":true}` | `{"raw_sql":true,"multi_db":true,"languages":"Rust","relations":true,"migrations":true,"studio_gui":false,"schema_first":true,"type_safe_queries":true,"connection_pooling":true}` |
| integrations.count | - | 5 |
| integrations.list | - | `[{"name":"PostgreSQL","native":true},{"name":"MySQL","native":true},{"name":"SQLite","native":true},{"name":"Oracle","native":true},{"name":"Firebird","native":true}]` |
| language.primary | C# | Rust |
| license.spdx | - | Apache-2.0 |
| pricing | - | `{"type":"open_source","sourceUrl":"https://diesel.rs","retrievedAt":"2026-10-13T13:49:22.704Z"}` |
| pricing.free_tier | - | yes |
| pricing.model | - | open_source |
| pricing.price_level | - | free |
| release.cadence_days | 26 | 32 |
| release.history | `[{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.89","date":"2026-09-23T04:33:15Z","type":"stable","version":"2.1.89"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.86","date":"2026-09-12T12:30:19Z","type":"stable","version":"2.1.86"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.79","date":"2026-05-16T20:40:41Z","type":"stable","version":"2.1.79"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.72","date":"2026-03-06T07:16:11Z","type":"stable","version":"2.1.72"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.66","date":"2025-02-06T12:26:12Z","type":"stable","version":"2.1.66"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.44","date":"2024-04-12T12:42:44Z","type":"stable","version":"2.1.44"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.42","date":"2024-04-12T10:23:44Z","type":"stable","version":"2.1.42"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.37","date":"2024-03-14T15:17:02Z","type":"stable","version":"2.1.37"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.35","date":"2024-03-06T15:08:18Z","type":"stable","version":"2.1.35"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.28","date":"2024-01-02T16:13:39Z","type":"stable","version":"2.1.28"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.24","date":"2023-11-23T09:30:26Z","type":"stable","version":"2.1.24"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.21","date":"2023-11-11T09:07:29Z","type":"stable","version":"2.1.21"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.15","date":"2023-10-19T12:52:19Z","type":"stable","version":"2.1.15"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.11","date":"2023-10-13T06:26:06Z","type":"stable","version":"2.1.11"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.4","date":"2023-09-13T20:52:44Z","type":"stable","version":"2.1.4"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.1","date":"2023-09-12T15:17:35Z","type":"stable","version":"2.1.1"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.0.151","date":"2023-08-18T09:51:46Z","type":"stable","version":"2.0.151"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.0.143","date":"2023-06-20T12:43:19Z","type":"stable","version":"2.0.143"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.0.138","date":"2023-06-09T15:32:01Z","type":"stable","version":"2.0.138"}]` | `[{"url":"https://github.com/diesel-rs/diesel/releases/tag/v2.3.14","date":"2026-10-07T14:04:16Z","type":"stable","version":"v2.3.14"},{"url":"https://github.com/diesel-rs/diesel/releases/tag/v2.3.13","date":"2026-09-04T14:56:06Z","type":"stable","version":"v2.3.13"},{"url":"https://github.com/diesel-rs/diesel/releases/tag/v2.3.12","date":"2026-08-07T06:07:49Z","type":"stable","version":"v2.3.12"},{"url":"https://github.com/diesel-rs/diesel/releases/tag/v2.3.11","date":"2026-07-10T06:02:47Z","type":"stable","version":"v2.3.11"},{"url":"https://github.com/diesel-rs/diesel/releases/tag/v2.3.10","date":"2026-06-05T06:30:07Z","type":"stable","version":"v2.3.10"},{"url":"https://github.com/diesel-rs/diesel/releases/tag/v2.3.9","date":"2026-04-30T12:44:17Z","type":"stable","version":"v2.3.9"},{"url":"https://github.com/diesel-rs/diesel/releases/tag/v2.3.8","date":"2026-04-24T09:25:29Z","type":"stable","version":"v2.3.8"},{"url":"https://github.com/diesel-rs/diesel/releases/tag/v2.3.7","date":"2026-03-13T07:08:59Z","type":"stable","version":"v2.3.7"},{"url":"https://github.com/diesel-rs/diesel/releases/tag/v2.3.6","date":"2026-01-23T07:57:29Z","type":"stable","version":"v2.3.6"},{"url":"https://github.com/diesel-rs/diesel/releases/tag/v2.3.5","date":"2025-12-19T07:31:24Z","type":"stable","version":"v2.3.5"},{"url":"https://github.com/diesel-rs/diesel/releases/tag/v2.3.4","date":"2025-11-26T16:29:31Z","type":"stable","version":"v2.3.4"},{"url":"https://github.com/diesel-rs/diesel/releases/tag/v2.3.3","date":"2025-10-24T13:57:15Z","type":"stable","version":"v2.3.3"},{"url":"https://github.com/diesel-rs/diesel/releases/tag/v2.3.2","date":"2025-09-19T09:18:32Z","type":"stable","version":"v2.3.2"},{"url":"https://github.com/diesel-rs/diesel/releases/tag/v2.3.0","date":"2025-09-12T12:42:57Z","type":"stable","version":"v2.3.0"},{"url":"https://github.com/diesel-rs/diesel/releases/tag/v2.2.12","date":"2025-07-11T12:28:38Z","type":"stable","version":"v2.2.12"},{"url":"https://github.com/diesel-rs/diesel/releases/tag/v2.2.11","date":"2025-06-18T15:18:26Z","type":"stable","version":"v2.2.11"},{"url":"https://github.com/diesel-rs/diesel/releases/tag/v2.2.10","date":"2025-04-25T06:43:32Z","type":"stable","version":"v2.2.10"},{"url":"https://github.com/diesel-rs/diesel/releases/tag/v2.2.9","date":"2025-04-04T11:29:52Z","type":"stable","version":"v2.2.9"},{"url":"https://github.com/diesel-rs/diesel/releases/tag/v2.2.8","date":"2025-03-03T17:47:32Z","type":"stable","version":"v2.2.8"},{"url":"https://github.com/diesel-rs/diesel/releases/tag/v2.2.7","date":"2025-01-31T10:19:17Z","type":"stable","version":"v2.2.7"}]` |
| reliability.status_page | yes | - |
| security.scorecard | - | 6.9 |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=nuget&package_name=dapper&per_page=100","last_12m":0,"max_severity":null}` | `{"count":6,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=cargo&package_name=diesel&per_page=100","last_12m":4,"max_severity":"CRITICAL"}` |

## Capabilities (ORM & Database Tools)

| Capability | Dapper | Diesel |
|---|:--:|:--:|
| **Core** |  |  |
| Type-safe queries | - | ✓ |
| Schema migrations | - | ✓ |
| Relations / joins API | ✓ | ✓ |
| Languages | C# / .NET (all TFMs) | Rust |
| **Modelling** |  |  |
| Schema-first modelling | - | ✓ |
| **Flexibility** |  |  |
| Raw SQL escape hatch | ✓ | ✓ |
| **Portability** |  |  |
| Multiple database backends | ✓ | ✓ |
| **Ops** |  |  |
| Connection pooling | - | ✓ |
| **DX** |  |  |
| Data browser / studio | - | ✗ |

*Source: vioscaleAI. Generated 2026-10-16T03:00:51.950Z. "-" = undocumented, not absent.*